Air cleaner

ABSTRACT

An air cleaner is provided that may include at least one blowing device including a main fan that generates air flow and a first discharge outlet through which air passing through the main fan is discharged; a flow controller movably provided at one side of the at least one blowing device, the flow controller including a sub-fan that generates air flow and a discharge grill through which air passing through the sub-fan is discharged; and a display provided in the discharge grill, the display device displaying operation information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation Application of prior U.S. patent application Ser. No. 15/363,643 filed Nov. 29, 2016, which claims priority under 35 U.S.C. § 119 to Korean Application Nos. 10-2016-0073090 filed on Jun. 13, 2016, 10-2016-0023663 filed on Feb. 26, 2016 and 10-2016-0139376, filed on Oct. 25, 2016, which are hereby incorporated by reference in their entirety.

BACKGROUND 1. Field

An air cleaner is disclosed herein.

2. Background

An air cleaner is a device that suctions in and purifies contaminated air and then discharges purified air. For example, the air cleaner may include a blower that introduces outside air into the air cleaner and a filter capable of filtering dust and bacteria, for example.

Generally, the air cleaner is configured to purify an indoor space, such as a home or an office. According to the air cleaner in the related art, there is a problem that a capacity thereof is limited, and thus, purification of air in an entire indoor space is limited. Accordingly, air around the air cleaner is purified whereas air in a space away from the air cleaner is not purified.

In order to solve this problem, there are efforts to improve a performance of a fan provided in the air cleaner. However, noise generated by the fan gradually increases as a blowing amount of the fan increases. Accordingly, there is a problem is that reliability of the product is decreased. Finally, there is inconvenience that the air cleaner has to be moved by a user in order to purify air in the desired space.

A related art air cleaner is disclosed in Korean Publication No. KR10-2012-0071992 published on Jul. 3, 2012 and entitled AIR CLEANER, which is hereby incorporated by reference. According to this disclosure, air cleaning components, such as the fan and a filter are installed, in an inside of a case having a substantially rectangular parallelepiped shape of a main body of the air cleaner. Air suction ports are formed on a side portion and a lower portion of the main body of the air cleaner and an air discharge port is formed on an upper portion of the main body thereof.

According to this configuration, there is a problem in that a suction capacity is reduced as the contaminated air is suctioned from a limited direction, that is, from a side direction and a lower direction relative to the air cleaner. A corner portion of the case having a rectangular parallelepiped shape provides structural resistance interfering with the suction of air.

In addition, there is a problem that an air cleaning function is limited as purified air does not flow to a space away from the air cleaner, whereas air around the air cleaner is purified. That is, the air which is purified in the air cleaner is discharged in only one direction, that is, only in an upward direction. Further, there is a problem that a blowing capacity is limited as only one blowing fan is provided in the main body of the air cleaner.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments will be described in detail with reference to the following drawings in which like reference numerals refer to like elements, and wherein:

FIG. 1 is a perspective view of an air cleaner according to an embodiment;

FIG. 2 is a perspective view illustrating an internal configuration of the air cleaner of FIG. 1;

FIG. 3 is a cross-sectional view, taken along line in FIG. 2;

FIG. 4 is an exploded perspective view of a second blowing device of the air cleaner of FIG. 1;

FIG. 5 is an exploded perspective view illustrating a third air guide and a second discharging guide of the air cleaner of FIG. 1;

FIG. 6 is an exploded perspective view of a flow adjusting device and a component to which the flow adjusting device is coupled of the air cleaner of FIG. 1;

FIG. 7 is a perspective view illustrating a configuration of the flow adjusting device of FIG. 6;

FIG. 8 is a view illustrating a state in which the third air guide and the second discharge guide of FIG. 5 are coupled to each other;

FIG. 9 is a sectional view of the flow adjusting device according to an embodiment;

FIG. 10 is an exploded perspective view of the flow adjusting device according to an embodiment;

FIG. 11 is an exploded perspective view of a drive portion and a fixing portion of the flow adjusting device according to an embodiment;

FIG. 12 is an exploded perspective view of a display device which is coupled to a discharge grill according to an embodiment;

FIG. 13 is a view illustrating a state in which a PCB assembly is coupled to the discharge grill according to an embodiment;

FIG. 14 is a perspective view of the discharge grill of FIG. 12;

FIG. 15 is an exploded perspective view of the PCB assembly of FIG. 13;

FIG. 16 is a view of an upper surface of the display device according to an embodiment;

FIG. 17 is a view of a lower surface of the PCB assembly according to an embodiment;

FIG. 18 is a view of a diffusing plate according to an embodiment;

FIG. 19 is an enlarged view of portion “A” of FIG. 17;

FIG. 20 is a view illustrating an operation of the display device according to an embodiment; and

FIGS. 21 to 23 are views illustrating a state in which air flows in the air cleaner of FIG. 11.

DETAILED DESCRIPTION

Hereinafter, embodiments will be described in detail with reference to the illustrative drawings. Regarding the reference numerals assigned to the components in the drawings, it should be noted that the same components may be designated by the same reference numerals, wherever possible, even though they are shown in different drawings. Also, in the description of embodiments, specific description of known related configuration or functions may be omitted when it is deemed that such description may cause ambiguous interpretation of the present invention.

Also, in the description of embodiments, terms such as first, second, A, B, (a), (b) or the like may be used herein when describing components. Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). In a case where it is described that any component is “connected” or “coupled” to another component, the component may be directly or indirectly connected or coupled to another component. However, it is to be understood that another component may be “connected” or “coupled” between the components.

Also, in the description of embodiments, terms such as first, second, A, B, (a), (b) or the like may be used herein when describing components. Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). In a case where it is described that any component is “connected” or “coupled” to another component, the component may be directly or indirectly connected or coupled to another component. However, it is to be understood that another component may be “connected” or “coupled” between the components.

FIG. 1 is a perspective view of an air cleaner according to an embodiment. With reference to FIG. 1, the air cleaner 10 according to this embodiment may include blowing devices or blowers 100 and 200 that generate air flow and a flow adjusting device or adjuster 300 that adjusts a discharge direction of the air flow generated in the blowing devices 100 and 200. The blowing devices 100 and 200 may include a first blowing device 100 that generates a first air flow and a second blowing device 200 that generates a second air flow.

The first blowing device 100 and the second blowing device 200 may be provided in a vertical direction. For example, the second blowing device 200 may be provided on or at an upper side of the first blowing device 100. In this case, the first air flow is a flow of indoor air suctioned from a lower side of the air cleaner 10 and the second air flow is a flow of indoor air suctioned from an upper side of the air cleaner 10.

The air cleaner 10 may include cases 101 and 201 that form an outer appearance thereof. That is, the cases 101 and 201 may include a first case 101 that forms an outer appearance of the first blowing device 100. The first case 101 may have a cylindrical shape. An upper portion of the first case 101 may have a diameter which is less than a diameter of a lower portion thereof. That is, the first case 101 may have a truncated cone shape.

The first blowing device 100 and the second blowing device 200 may be referred to as a “first air cleaning module or cleaner 100” and a “second air cleaning module or cleaner 200”, respectively, in that the first blowing device 100 and the second blowing device 200 perform a function of cleaning air in a space to be cleaned. The first blowing device 100 may be referred to as a “lower air cleaning module or cleaner” or “lower module or cleaner” in that the first blowing device 100 is provided at a lower portion of the air cleaner 10 and the second blowing device 200 may be referred to as an “upper air cleaning module or cleaner” or “upper module or cleaner” in that the second blowing device 200 is provided at an upper portion of the air cleaner 10. The flow adjusting device 300 may be referred to as “flow adjusting module or adjuster 300” or “flow control module or controller 300”.

The first case 101 may include a first separation portion 101 a at which two parts which constitute the first case 101 may be assembled or disassembled. The first case 101 may further include a hinge portion or hinge which is provided on an opposite of the first separation portion 101 a. The two parts may be capable of being relatively rotated about the hinge portion.

When at least any one part of the two parts rotates, the first case 101 may be opened and separated from the air cleaner 10. A locking device or lock may be provided at a portion at which the two parts are coupled, that is, a side opposite to the hinge portion. The locking device may include a locking projection or a magnet or coupler. Components of the first blowing device 100 may be replaced or repaired by opening the first case 101.

The first case 101 may include a first suction portion or inlet 102 through which air may be suctioned in a radial direction. The first suction portion 102 may include one or more through hole formed to pass through at least a portion of the first case 101. A plurality of first suction portions 102 may be provided.

The plurality of first suction portions 102 may be evenly provided in a circumferential direction along an outer circumferential surface of the first case 101 so that air suction may be performed in any direction relative to the first case 101. That is, air may be suctioned in 360 degree directions relative to a center line that extends in the vertical direction and passes through an inside center of the first case 101.

Accordingly, a suction amount of air may be increased by the first case 101 having a cylindrical shape and the plurality of first suction portions 102 formed along the outer circumferential surface of the first case 101. Flow resistance to suctioned air may be reduced by avoiding a cube shape having edges or edge portions such as the case of the related art air cleaner.

Air which is suctioned in through the first suction portion 102 may flow substantially in the radial direction from the outer circumferential surface of the first case 101. Directions may be defined as follows. Referring to the FIG. 1, the vertical direction may refer to an axial direction and a transverse direction may refer to the radial direction. The axial direction may correspond to a central axis direction of the first fan 160 and the second fan 260, which are described hereinafter, that is, a motor shaft direction of the fan. The radial direction may refer to a direction which is perpendicular to the axial direction. The circumferential direction may refer to a virtual circle direction which is formed when rotating about the axial direction and having a distance of the radial direction as a rotational radius.

The first blowing device 100 may include a base 20 provided at a lower side of the first case 101 and placed on the ground. The base 20 may be positioned spaced apart from a lower end portion or end of the first case 101 in a downward direction. A base suction portion or inlet 103 may be formed in a space between the first case 101 and the base 20.

Air which is suctioned in through the base suction portion 103 may flow in an upward direction through a suction port 112 of a suction grill 110 (see FIG. 2), which may be provided in or at an upper side of the base 20. That is, the first blowing device 100 may include the plurality of suction portions 102 and the base suction portion 103. Air in a lower portion of the indoor space may be easily introduced to the first blowing device 100 through the plurality of suction portions 102 and the base suction portion 103, Accordingly, the suction amount of air may be increased.

A first discharge portion or outlet 105 may be formed at an upper portion of the first blowing device 100. The first discharge portion 105 may be formed on a first discharge grill 195 of a first discharge guide device or guide 190 (see, FIG. 8) which may be provided in the first blowing device 100. The first discharge guide 190 may form an outer appearance of an upper end portion or end of the first blowing device 100. Air discharged through the first discharge portion 105 may flow to the upper side in the axial direction.

The cases 101 and 201 may include a second case 201 which may form an outer appearance of the second blowing device 200. The second case 201 may have a cylindrical shape. An upper portion of the second case 201 may have a diameter which is less than a diameter of a lower portion thereof. That is, the second case 201 may have a truncated cone shape.

The second case 201 may include two parts and a hinge portion or hinge which are capable of being assembled or being disassembled through a second separation portion 201 a. The second case 201 may be openable similar to the first case 101. The second case 201 may be the same or similar to the first case 101, and thus, repetitive disclosure has been omitted. Inner components of the second blowing device 200 may be replaced or repaired by opening the second case 201.

A diameter of a lower end portion of the second case 201 may be less than a diameter of the upper end portion or end of the first case 101. Accordingly, in a general shape of the cases 101 and 201, a lower cross-sectional area of the cases 101 and 102 may be formed to be greater than an upper cross-sectional area. Accordingly, the air cleaner 10 may be stably supported on the ground.

The second case 201 may include a second suction portion or inlet 202 through which air may be suctioned in the radial direction. The second suction portion 202 may include one or more through hole formed to pass through at least a portion of the second case 201. A plurality of the second suction portion 202 may be provided.

The plurality of second suction portions 202 may be evenly provided in the circumferential direction along an outer circumferential surface of the second case 201 so that air suction may be performed in any direction relative to the second case 201. That is, air may be suctioned in 360 degree directions relative to a center line that extends in the vertical direction and passes through an inside center of the second case 201.

Accordingly, a suction amount of air may be increased by the second case 201 having a cylindrical shape and the plurality of second suction portions 202 formed along the outer circumferential surface of the second case 201. Flow resistance to suctioned air may be reduced by avoiding a cube shape having an edge portions such as the case of the related are air cleaner. Air which is suctioned in through the second suction portion 202 may flow substantially in the radial direction from the outer circumferential surface of the second case 201.

The air cleaner 10 may include a dividing device or divider 400 provided between the first blowing device 100 and the second blowing device 200. By the dividing device 400, the second blowing device 200 may be positioned at the upper side of the first blowing device 100 spaced apart therefrom. The dividing device 400 will be described hereinafter, with reference to the drawings.

The flow adjusting device 300 may be provided at an upper side of the second blowing device 100. An air flow path of the second blowing device 100 may communicate with an air flow path of the flow adjusting device 300. The air passing through the second blowing device 100 may be discharged through a second discharge portion or outlet 305 to the outside via the air flow path of the flow adjusting device 300. The second discharge portion 305 may be provided on or at an upper end portion of the flow adjusting device 300.

The flow adjusting device 300 may be movable. That is, the flow adjusting device 300 may be movable between a laid-out state (first position), as illustrated in FIG. 1, or an inclined erected state (second position), as illustrated in FIG. 22. In addition, a display device or display 600 that displays operation information of the air cleaner may be provided at an upper portion of the flow adjusting device 300. The display device 600 may be movable together with the flow adjusting device 300.

FIG. 2 is a perspective view of the air cleaner of FIG. 1. FIG. 3 is a cross-sectional view, taken along line of FIG. 2.

Referring to FIGS. 2 and 3, a base 20 and a suction grill 110, which may be disposed or provided on or at an upper side of the base 20 may be included in the first blowing device 100 according to this embodiment. The base 20 may include a base main body 21, which may be placed on the ground, and a base projecting portion or projection 22 that projects from the base main body 21 in the upward direction and on which the suction grill 110 may be placed. The base projecting portion 22 may be provided at both sides of the base 20.

The base main body 21 and the suction grill 110 may be spaced apart from each other by the base projecting portion 22. The base suction portion 103 which forms a suction space of air may be included between the base 20 and the suction grill 110.

The suction grill 110 may include a grill main body 111 having a substantially ring shape and a rim portion or rim 110 that protrudes from an outer circumferential surface of the grill main body 111 in the upward direction. By the configuration of the grill main body 111 and the rim portion 111 a, the suction grill 110 may have a stepped structure.

The suction grill 110 may include a suction portion or inlet 112 formed on the rim portion 111 a. The suction portion 112 may protrude along a circumference of the rim portion 111 a in the upward direction and extend in a circumferential direction. In addition, a plurality of suction holes 112 a may be formed in the suction portion 112. The plurality of suction holes 112 a may communicate with the base suction portion 103.

Air suctioned in through the plurality of suction holes 112 a and the base suction portion 103 may pass through a first filter member or filter 120. The first filter may have a cylindrical shape and a filter surface that filters air. The air passing through the plurality of suction holes 112 a may be introduced to an inside portion of the first filter 120 by passing through an outer circumferential surface of the cylindrical first filter 120.

The first blowing device 100 may further include a first filter frame 130, which may form a mounting space of the first filter 120. That is, the first filter frame 130 may include a first frame 131 which forms a lower portion of the first filter frame 130 and a second frame 132 which forms an upper portion of the first filter frame 130.

The first filter frame 130 may further include a first filter supporting portion or support 135 that extends from the first frame 131 to the second frame 132 in the upward direction. The first frame 131 and the second frame 132 may be spaced apart from each other by the first filter supporting portion 135. A plurality of first filter supporting portions 135 may be provided and the plurality of the first filter supporting portions 135 may be arranged in the circumferential direction, and thus, may be connected to rim portions or rims of the first frame 131 and the second frame 132. A mounting spaced for the first filter 120 may be defined by the plurality of first filter supporting portions 135 and the first frame 131 and the second frame 132. In addition, a first supporting portion cover 136 may be coupled to an outside of the first filter supporting portion 135.

A sensor device or sensor 137 may be installed or provided in or on the first filter frame 130. The sensor device 137 may include a dust sensor that senses an amount of dust in the air and a gas sensor that senses an amount of gas in the air. The dust sensor and the gas sensor may be disposed or provided to be supported by the second frame 132 of the first filter frame 130.

The first filter 120 may be detachably mounted in the mounting space. The first filter 120 may have a cylindrical shape and air may be introduced through the outer circumferential surface of the first filter 120. Impurities, such as fine dust in air, may be filtered in a process of passing through the first filter 120.

The air may be introduced from any direction relative to the first filter 120, by the first filter 120 having the cylindrical shape. Accordingly, a filtering area of air may be increased.

The mounting space may have a cylindrical shape corresponding to the shape of the first filter 120. The first filter 120 may be slidably introduced toward the mounting space in a mounting process. In contrast, the first filter 120 may be slidably withdrawn from the mounting space in a separating process.

The first blowing device 100 may further include a first fan housing 150, which may be installed or provided on or at an outlet side of the first filter 120. A housing space portion or space 152, in which a first fan 160 may be accommodated, may be formed in the first fan housing 150. In addition, the first fan housing 150 may be supported by the first filter frame 130.

A first fan introducing portion 151 that guides introduction of air to an inside of the first fan housing 150 may be included in a lower portion of the first fan housing 150, A grill may be provided in or on the first fan introducing portion 151 to prevent, for example, a finger of a user from being put into the inside of the first fan housing 150 when the first filter 120 is separated.

The first blowing device 100 may further include an ionizer 158 that removes or sterilizes smell particles in the air. The ionizer 158 may be coupled to the first fan housing 150 and be capable of acting on the air which flows inside of the first fan housing 150.

The sensor device 137 and the ionizer 158 may also be installed or provided in a second blowing device 200 described hereinafter. For example, the sensor device 137 and the ionizer 158 may be installed or provided in one of the first blowing device 100 or the second blowing device 200.

The first fan 160 may be located on or at an the upper side of the first fan introducing portion 151. For example, the first fan 160 may include a centrifugal fan that introduces air in the axial direction and then discharges air to the upper side in the radial direction.

The first fan 160 may include a hub 161 to which a rotational shaft 165 a of a first fan motor 165, which may be a centrifugal fan motor, may be coupled, a shroud 162 which may be disposed or provided in a state of being spaced apart from the hub 161, and a plurality of blades 163, which may be disposed or provided between the hub 161 and the shroud 162. The first fan motor 165 may be coupled to the upper side of the first fan 160.

The hub 161 may have a bowl shape, a diameter of which may be gradually reduced in the downward direction. The hub 161 may include a shaft coupling portion to which the rotational shaft 165 a may be coupled and a first blade coupling portion that extends at an incline from the shaft coupling portion in the upward direction.

The shroud 162 may include a lower end portion or lower end, on or at which a shroud suction port, into which air having passed through the first fan introducing portion 151 may be suctioned, may be formed and a second blade coupling portion that extends from the lower end portion in the upward direction.

A first surface of each blade 163 may be coupled to the first blade coupling portion of the hub 161 and a second surface thereof may be coupled to the second blade coupling portion of the shroud 162. The plurality of blades 163 may be disposed or provided spaced apart in a circumferential direction of the hub 161.

The first blowing device 100 may further include a first air guide device or guide 170 that guides a flow of air being passed through the first fan 160 by being coupled to an upper side of the first fan 160.

The first air guide 170 may include an outer wall 171 having a cylindrical shape and an inner wall 172 positioned on or at an inside of the outer wall 171 and having a cylindrical shape. The outer wall 171 may be disposed or provided to surround the inner wall 172. A first air flow path 172 a, through which air may flow may include circumferential surface of the outer wall 171 and an outer circumferential surface of the inner wall 172.

The first air guide 170 may include a guide rib 175 which may be disposed or provided on or in the first air flow path 172 a. The guide rib 175 may extend from the outer circumferential surface of the inner wall 172 to the inner circumferential surface of the outer wall 171. A plurality of guide ribs 175 may be disposed or provided spaced apart from each other. The plurality of guide ribs 175 may guide the air introduced to the first air flow path 172 a of the first air guide 170 via the first fan 160 in the upward direction.

The guide rib 175 may extend at an incline from a lower portion of the outer wall 171 and the inner wall 172 in the upward direction. For example, the guide rib 175 may be rounded, and thus, guide air so that it flows at an incline in the upward direction.

The first air guide 170 may further include a motor accommodating portion 173 that extends from the inner wall 172 to the lower side, and thus, accommodates the first fan motor 165. The motor accommodating portion 173 may have a bowl shape, a diameter of which may be gradually reduced in the downward direction. A shape of the motor accommodating portion 173 may correspond to the shape of the hub 161. The motor accommodating portion 173 may be inserted into the hub 161.

The first fan motor 165 may be supported to or at an upper side of the motor accommodating portion 173. The rotational shaft 165 a of the first fan motor 165 may extend from the first fan motor 165 in the downward direction and be coupled to the shaft coupling portion 161 a of the hub 161 through the lower surface portion of the motor accommodating portion 173.

The first blowing device 100 according to this embodiment may further include a second air guide device or guide 180 which may be coupled to an upper side of the air guide 170 and guide air having passed through the first air guide 170 to the discharging guide 190.

The second air guide 180 may include a first guide wall 181, which may have a substantially cylindrical shape, and a second guide wall 182, which may be positioned at an inside of the first guide wall 181 and have a substantially cylindrical shape. The first guide wall 181 may be disposed or provided to surround the second guide wall 182.

A second air flow path 185, through which air may flow, may be formed between an inner circumferential surface of the first guide wall 181 and an outer circumferential surface of the second guide wall 182. Air which flows along the first air flow path 172 a of the first air guide 170 may flow in the upward direction through the second air flow path 185. The second air flow path 185 may be referred to as a “discharge flow path.” In addition, the first discharge portion 105 may be provided on or at an upper side of the second air flow path 185.

A space portion or space, in which at least a portion of a printed circuit board (PCB) device 500 may be accommodated by passing therethrough in the vertical direction may be formed inside of the second guide wall 182 having a cylindrical shape. The PCB device 500 may include a power supply portion or power supply 520 and a main PCB 511.

The power supply portion 520 may refer to a device that receives commercial power supplied from a power line connected to the air cleaner 10 to supply power to the main PCB 511 and a plurality of components in the air cleaner 10. The power supply 520 may include a PCB (power PCB) for AC power. The main PCB 511 may include a PCB for DC power, which may be driven by a DC voltage converted in the PCB for AC power.

The PCB device 500 may further include a PCB supporting plate 525 that supports the power supply portion 520 and the main PCB 511. The main PCB 511 may be supported on one or a first surface of the PCB supporting plate 525, and the power supply portion 520 may be supported on the other or a second surface of the PCB supporting plate 525.

The PCB device 500 may include a communication module 515 through which the air cleaner 10 is capable of communicating with an external device. For example, the communication module 515 may include a Wi-Fi module. The communication module 515 may be supported on the PCB supporting plate 525, and may be disposed or provided at a lower side of the main PCB 511.

The first blowing device 100 may further include a first discharge guide device or guide 190, which may be disposed or provided on or at an upper side of the second air guide 180, that is, an outlet side of air flow passing through the second air guide 180 relative to the air flow and guide the air discharge to outside of the air cleaner 10. A first discharge portion 105, through which air may be discharged is formed in the first discharging guide 190.

The second blowing device 200 may include a second filter member of filter 220, a supporting device or support 240 that supports a lower portion of the second filter 220, and a lever device or lever 242 provided on or at a lower side of the supporting device 240 to support the second filter 220 and the supporting device 240 (see FIG. 4).

The second blowing device 200 may further includes a lever supporting device or support 560 that supports the second filter 220 or the lever device of the second blowing device 200. The lever supporting device 560 may have a substantially annular shape. The lever supporting device 560 may include a space portion or space formed passing therethrough in the vertical direction and defining an installation space portion or space, in which the PCB device 500 may be located. The space portion may be formed at a substantially center portion of the lever supporting device 560.

A dividing device 400 may be provided between the first blowing device 100 and the second blowing device 200, The dividing device 400 may include a dividing plate 430 that separates or blocks air flow generated in the first blowing device 100 and air flow generated in the second blowing device 200. By the dividing plate 430, the first and second blowing devices 100 and 200 may be spaced apart from each other in the vertical direction.

That is, a separation space in which the dividing plate 430 may be located or provided may be formed between the first and second blowing devices 100 and 200. The first discharge guide 190 of the first blowing device 100 may be located at a lower end portion or end of the separation space, and the lever supporting device 510 of the second blowing device 200 may be located at an upper end portion or end of the separation space.

The separation space may be divided into an upper space and a lower space by the dividing plate 430. The lower space may be a first space portion or space through which air discharged from the first discharge portion 105 of the first discharge guide 190 may pass in a process in which the air flows to the outside of the air cleaner 10. The upper space may be a second space portion or space that functions as a grasping space into which a user may put his or her hand when moving the air cleaner 10.

Air discharged from the first discharge portion 105 may be guided by the dividing plate 430 to flow to the outside of the air cleaner 10. Accordingly, it is possible to prevent the air from being introduced into the second blowing device 200.

FIG. 4 is an exploded perspective view of the second blowing device of the air conditioner of FIG. 1. Referring to FIG. 4, the second blowing device 200 according to this embodiment may include the lever supporting device 560, the lever device 242, the supporting device 240, the second filter 220, the second filter frame 230, a second fan housing 250, and a second fan 260.

The second filter 220 may have a cylindrical shape having an opened upper portion. The second filter 220 may include a filter main body 221 which has a cylindrical filter portion inside of which is empty and a filter hole 222 which may be opened at an upper end portion or end of the filter main body 221. A filter grasping portion or grasp 221 a may be provided at an upper or lower portion of the filter main body 221. Air may be introduced to the inside of the filter main body 221 through an outer circumferential surface of the filter main body 221, and may be discharged from the second filter 220 through the filter hole 222. The configuration of the second filter 220 may be applied to the first filter 120.

The lever supporting device 560 may include a lever supporting main body 561 having an annular shape. The lever supporting main body 561 may extend at a slight incline in the upward direction with respect to the axial direction toward an outer circumferential surface from an inner circumferential surface thereof. That is, a surface which form the lever supporting main body 561 forms an inclined surface. A space between the inclined surface and an upper surface of the dividing plate 430 may provide the second space portion 458 in which a user's hand may be located. The lever supporting main body 561 may be referred to as a “blocking portion” in that air discharged through the first discharge portion 105 of the first blowing device 100 may be blocked from being introduced to the second blowing device 200.

The lever supporting device 560 may further include a movement guide portion or guide 565 which may protrude from the lever supporting main body 561 in the upward direction. A plurality of movement guides 565 may be spaced apart from one another in a circumferential direction of the lever supporting main body 561. In addition, the lever supporting device 560 may further include a supporting projection 566 that protrudes in the upward direction from the inner circumferential surface of the lever supporting main body 561. The supporting projection 566 may support the lever device of the second blowing device 200.

The lever device 242 may be operable by a user. For example, the lever device 242 may be rotatable in the circumferential direction. The lever device 242 may include a lever main body 243, which may have a substantially ring shape and be rotatable. In addition, a plurality of cut-out portions or cut-outs 245 which may be disposed or provided at positions corresponding to the plurality of movement guides 565 may be formed in the lever main body 243.

The plurality of cut-out portions 245 may be spaced apart from one another, and are arranged in the circumferential direction of the lever main body 243. In addition, each of the plurality of cut-out portions 245 may be rounded with a predetermined curvature in the circumferential direction, corresponding to a curvature of the outer circumferential surface of the lever main body 243.

The lever device 142 may be supported on an upper surface of the lever supporting main body 561. If the lever device 242 is supported by the lever supporting main body 561, the plurality of movement guides 565 may be inserted into the plurality of cut-out portions 245. In detail, the plurality of movement guides 565 may protrude to the upper side of the plurality of cut-out portions 245 by passing through the plurality of cut-out portions 245.

A length of each of the plurality of cut-out portions 245 may be longer than a length of the movement guide 565. Thus, the lever device 242 may rotate in a state in which the movement guide 565 is inserted into the cut-out portion 245. In addition, one end portion or end of the movement guide 565 may interfere with one end portion or end of the cut-out portion 245 in a process in which the lever device 242 rotates in one direction, and the other end portion or end of the movement guide 565 may be interfere with the other end portion or end of the cut-out portion 245. A second handle 244 may be provided on the outer circumferential surface of the lever main body 243.

A supporting device 240 that supports the second filter 220 may be provided on or at an upper side of the lever device 242. The supporting device 240 may include a first handle 241 which may be coupled to the second handle 244. A user may rotate the lever main body 143 and the supporting device 140 in a clockwise direction or in a counterclockwise direction by grasping the first and second handles 241 and 244. The lever device 242 may support a lower surface of the supporting device 240. The supporting device 240 may include a support projecting portion or projection (not shown) which may be in contact with the movement guide 565. The support projecting portion may protrude in the downward direction from the lower surface of the supporting device 240, and may be provided at a position corresponding to the movement guide 565. In addition, a shape of the support projecting portion may correspond to a shape of the movement guide 565, and include an inclined surface that gradually protrudes in the circumferential direction. In addition, a direction in which the movement guide 565 gradually protrudes and a direction in which the support projecting portion gradually protrudes may be opposite to each other.

For example, if the direction in which the movement guide 565 protrudes is the counterclockwise direction, the direction in which the support projecting portion protrudes may be the clockwise direction. The support projecting portion may be disposed or provided at a position corresponding to the cut-out portion 245. That is, the movement guide 565 and the support projecting portion may be disposed or provided at a position at which they are inserted into the cut-out portion 245.

The lever device 242 and the supporting device 240 may rotate together. In the rotation process, the movement guide 565 and the support projecting portion may interfere with each other. That is, if a lower portion of the support projecting portion and an upper portion of the movement guide 565 are in contact with each other, the lever device 242 and the supporting device 240 may be lifted in the upward direction. In addition, the second filter 220 supported by the supporting device 240 may be in a state in which the second filter 220 is coupled to the second blowing device 200 while moving in the upward direction.

On the other hand, if the lower portion of the support projecting portion and the upper portion of the movement guide 565 are in contact with each other or if the inference between the support projecting portion and the movement guide 565 is released, the lever device 242 and the supporting device 240 may move downward. In addition, the second filter 220 supported by the supporting device 240 may be in a state (released state) in which the second filter 220 is separable from the second blowing device 200.

The second blowing device 200 may include a second filter frame 230, which may form a mounting space for the second filter 220. That is, the second filter frame 230 may include a first frame 231, which may form a lower portion of the second filter frame 230, and a second frame 232 which may form an upper portion of the second filter frame 230.

The first frame 231 may include a frame depression portion or depression 231 a having a downwardly depressed shape. The frame depression portion 231 a may be configured such that at least a portion of the first frame 231 is depressed. The frame depression portion 231 a may provide a space portion or space in which the first and second handles 241 and 244 may be movable. The first and second handles 241 and 244 may be located in the space portion, to rotate in the clockwise direction or in the counterclockwise direction.

The second frame 232 may be spaced apart from the first frame 231 in the upward direction. The second frame 232 may have a substantially ring shape. The ring-shaped inside portion space of the second frame 232 may form at least a portion of an air flow path passing through the second filter frame 230. In addition, an upper portion of the second frame 232 may support the second fan housing 250.

The second filter frame 230 may further include a second filter supporting portion or support 235 that extends from the first frame 231 to the second frame 232 in the upward direction. The first frame 231 and the second frame 232 may be spaced apart from each other by the second filter supporting portion 235. A plurality of second filter supporting portions 235 may be provided, and the plurality of the first second supporting portions 235 may be arranged in the circumferential direction, and thus, may be connected to rim portions or rims of the first frame 231 and the second frame 232.

A mounting space for the second filter member 220 may be defined by the first and second frames 231 and 232 and the plurality of second filter supporting portions 235. In addition, a first supporting portion cover 236 may be coupled to an outside of the second filter supporting portion 235.

A sensor device or sensor 237 may be installed or provided in or on the second filter frame 230. The sensor device 237 may include a dust sensor 237 a that senses an amount of dust in the air and a gas sensor 237 b that senses an amount of gas in the air. The dust sensor 237 a and the gas sensor 237 b may be disposed or provided to be supported by the second frame 232 of the second filter frame 230. The sensor device 237 may be the same or similar to the first sensor device 137, and thus, repetitive disclosure has been omitted.

The second filter 220 may be detachably mounted on or in the mounting space. The second filter 220 may have a cylindrical shape and air may be introduced through an outer circumferential surface of the second filter 220. Impurities, such as fine dust in air, may be filtered in a process of passing through the second filter 220.

The air may be introduced from any direction relative to the second filter 120, by the second filter 220 having the cylindrical shape. Accordingly, a filtering area of air may be increased. The mounting space may have a cylindrical shape corresponding to the shape of the second filter 220. The second filter 220 may be slidably introduced toward the mounting space in a mounting process. In contrast, the second filter 220 may be slidably withdrawn from the mounting space in a separating process.

On the other hand, the second filter 220 may be slid toward the mounting space to the inside in the radial direction in a state of being separated from the mounting space, is supported on the upper surface of the supporting device 240, and thus, may be moved into close contact upwardly by an operation of the first and second handles 241 and 244. At this time, the second filter 220 may be in a coupling position.

The second blowing device 200 may includes a second fan housing 250, which may be installed or provided on or at an outlet side of the second filter 220. A housing space portion or space 252, in which the second fan 260 may be accommodated, may be formed in the second fan housing 250. The second fan housing 250 and the second fan 260 may be the same or similar to the first fan housing 150 and the first fan 160, and therefore, repetitive disclosure has been omitted.

The second blowing device 200 may further include an ionizer 258 that removes or sterilizes smell particles in the air. The ionizer 258 may be coupled to the second fan housing 250 and may act the air which flows inside of the second fan housing 250. The ionizer 258 may be the same or similar to the ionizer of the first blowing device 100, and therefore, repetitive disclosure has been omitted.

FIG. 5 is an exploded perspective view illustrating a third air guide and a second discharge guide of the air cleaner of FIG. 1. FIG. 6 is an exploded perspective view of a flow adjusting device and a component to which the flow adjusting device is coupled of the air cleaner of FIG. 1. FIG. 7 is a perspective view of the flow adjusting device of FIG. 6. FIG. 8 is a view illustrating a state in which the third air guide and the second discharge guide of FIG. 5 are coupled to each other. FIG. 9 is a sectional view of the air flow adjusting device according to an embodiment. FIG. 10 is an exploded perspective view of the flow adjusting device according to an embodiment. FIG. 11 is an exploded perspective view a drive portion and a fixing portion of the air flow control device according to an embodiment.

Referring to FIGS. 5 to 11, the second blowing device 200 may include a third air guide device or guide 270 that guides a flow of air having passed through the second fan 260 by being coupled to an upper side of the second fan 260. The third air guide 270 may include an outer wall 271 that forms an outer circumferential surface of the third air guide 270 and an inner wall 272 positioned inside of the outer wall 271 and having a cylindrical shape. A first air flow path 272 a, through which air may flow, may be formed between an inner circumferential surface of the outer wall 271 and an outer circumferential surface of the inner wall 272.

The third air guide 270 may include a guide rib 275 which may be disposed or provided on or in the first air flow path 272 a. The guide rib 275 may extend from the outer circumferential surface of the inner wall 272 to the inner circumferential surface of the outer wall 271.

The third air guide 270 may include a motor accommodating portion 273 that extends from the inner wall 272 in the downward direction, and thus, accommodates the second fan motor 265. The motor accommodating portion 273 may have a bowl shape a diameter of which may be gradually reduced toward a lower side thereof.

The second fan motor 265 may be coupled to the upper side of the second fan 260, and thus, provide a drive force to the second fan 260. A motor coupling portion 266 may be provided on or at one side of the second fan motor 265, and the motor coupling portion 266 may fix the second fan motor 265 to the third air guide 270.

The third air guide 270 may include guide devices or guides 276 and 277 that guide a movement of the air flow control device 300. The guides 276 and 277 may include a first rack 276 and a shaft guide groove 277, which may be included in the motor accommodating portion 273.

The first rack 276 may be linked to the first gear 360 of the air flow control device 300. The first rack 276 may be provided on or at an inner circumferential surface of the motor accommodating portion 273 and may be provided along a set predetermined curvature in the circumferential direction. A length of the first rack 276 may be a length which is set based on a distance linked to the first gear 360.

The flow adjusting device 300 may be rotated in the lateral direction, that is, in the clockwise direction or in the counterclockwise direction. In this process, the first gear 360 may be rotated along a predetermined rotational radius about the rotational shaft 354 of the flow adjusting device 300.

The shaft guide groove 277 may be a groove that guides rotation of the first gear 260 and may extend rounded with a predetermined curvature. For example, the shaft guide groove 277 may be rounded in the circumferential direction. That is, the shaft guide groove 277 may have an arc shape.

The first gear shaft 362 of the first gear 360 may be inserted into the shaft guide groove 277. In a process of rotation of the first gear 360, the first gear shaft 360 may be moved along the shaft guide groove 277.

The second blowing device 200 may include a second discharge guide 280, which may be installed or at an on or at an upper side of the third air guide 270 and guide a flow of air which passed through the third air guide 270.

The second discharge guide 280 may have a substantially annular shape an inside portion of which may be empty. That is, the second discharge guide 280 may include a discharge outer wall 281 which may form an outer circumferential surface of the second discharge guide 280 and have a cylindrical shape and a discharge inner wall 282 which may form an inner circumferential surface of the second discharge guide 280 and have a cylindrical shape.

The discharge outer wall 281 may surround the discharge inner wall 282. A second air flow path, that is, a discharge flow path along which air passing through the third air guide 270 may flow, may be formed between an inner circumferential surface of the discharge outer wall 281 and an outer circumferential surface of the discharge inner wall 282. The discharge flow path may be positioned on or at an upper side of the first air flow path 272 a in which the guide rib 275 is provided.

The second discharge guide 280 may include a second discharge grill 288, which may be disposed or provided on or in the discharge flow path. The second discharge grill 288, may extend from the outer circumferential surface of the discharge inner wall 282 to the inner circumferential surface of the discharge outer wall 281.

The second discharge guide 280 may further include a rotation guide plate 283, which may be coupled to the discharge inner wall 282. The rotation guide plate 283 may extend from the inner circumferential surface of the discharge inner wall 282 toward an inside center of the second discharge guide 280.

The rotation guide plate 283 may include a shaft inserting portion 284, which may provide a rotational center in the lateral direction of the flow adjusting device 300. The rotational shaft 354 may be inserted into the shaft inserting portion 284. The shaft inserting portion 284 may be positioned in the inside central portion of the second discharge guide 280. The rotation guide plate 283 may be a supporting plate that supports the shaft inserting portion 284.

A bearing groove 285 may be further included in the rotation guide plate 283. A first bearing 353, which may be provided on the flow adjusting device 300, may be inserted into the bearing groove 285. The bearing groove 285 may guide movement of the first bearing 353 and extend to be rounded with a predetermined curvature. For example, the bearing groove 285 may be rounded in the circumferential direction. That is, the bearing groove 285 may have an arc shape. In a process of rotation of the flow adjusting device 300 in the lateral direction, the first bearing 353 may be moved by inserted into the bearing groove 285, and thus, allows a friction force which is generated in the process of rotation of the flow adjusting device 300 to be reduced.

The flow adjusting device 300 may include a third fan housing 310, in which a third fan 330 may be accommodated. The third fan housing 310 may have a substantially annular shape. For convenience of description, the first fan 160 and the second fan 260 may be referred to as a “blowing fan,” and the third fan 330 may be referred to as a “circulation fan.” That is, the first fan 160 and the second fan 260 may be referred to as a “main fan,” and the third fan 330 may be referred to as a “sub-fan.”

The third fan housing 310 may include a housing cover 312 which may form an outer appearance thereof. A housing main body 311, which may have an annular shape, may be provided inside of the housing cover 312. That is, the housing cover 312 may be coupled to the outer circumferential surface of the housing main body 311, and may be supported by the housing main body 311.

The housing main body 311 may include a cover supporting portion or support 311 a, which may protrude from an outer circumferential surface of the housing main body 311 to support an inside of the housing cover 312. The cover supporting portion 311 a may have a bent shape, and an outer surface of the cover supporting portion 311 a may be coupled to an inner surface of the housing cover 312.

The housing cover 312 may surround the housing main body 311, and the housing main body 311 and the housing cover 312 may be rotated or moved together. The third fan 330 may be accommodated inside the housing main body 311. In addition, a housing flow path 314, through which air may flow as the third fan 330 is driven, may be formed in an inside portion space of the housing main body 311. A blade 333 of the third fan 330 may be located in the housing flow path 314. By rotation of the blade 333, air flow in the upward direction via the housing flow path 314. The housing flow path 314 may extend from a space in which the blade 333 is located to an upper space of the blade 333.

A discharge grill 315, which may form the second discharge portion 305 through which air passing through the third fan 330 may be discharged, may be provided on or at an upper side of the third fan housing 310. That is, referring to FIG. 17, the discharge grill 315 may include a grill outer wall 316, a grill inner wall 317 provided at an inside of the grill outer wall 316, and a plurality of grill portions 315 a, which extend from the grill outer wall 316 to the grill inner wall 317. Spaces between the plurality of grill portions 315 a may form the second discharge portion 305.

As the second discharge portion 305 along with the first discharge portion 105 of the first blowing device 100 is provided in the air cleaner 10, a discharging amount of air may be improved, and air may be discharged in various directions.

Each of the grill outer wall 316 and the grill inner wall 317 may have a cylindrical shape, and the grill outer wall 316 may surround the grill inner wall 317. In addition, the second discharge portion 305 may be formed on or at the upper side of the housing flow path 314. Thus, air having passed through the housing flow path 314 may be discharged outside of the air cleaner 10 via the second discharge portion 305 of the discharge grill 315.

The discharge grill 315 may further include a depression portion or depression 318 which may have a shape depressed at a substantially center portion of the discharge grill 315 and support the display device 600. The depression portion 318 may be provided in or at a lower end portion or end of the grill inner wall 317.

A supporting rib 318 a that supports a display PCB 610 of the display device 600 may be provided in the depression portion 318. The supporting rib 318 a may protrude in the upward direction from an upper surface of the depression portion 318. In addition, the grill inner wall 317 may support a lower side of the display PCB 610.

The display device 600 may include a PCB assembly 601. The PCB assembly 601 may include the display PCB 610 on which an illumination source may be provided, a reflector 620, which may be coupled to an upper side of the display PCB 610 and concentrate light irradiated from the illumination source in the upward direction such that displayed information may be displayed as various characters, numbers, or symbols, and a diffusing plate 630 which may be supported on the discharge grill 315 and guides light irradiated from the illumination source to be refracted and then face an upper surface of the display device 600, that is, a rim portion or rim 650 of a display screen 602.

An axial flow fan may be included in the third fan 330. That is, the third fan 330 may be operated in order to axially discharge air which is axially introduced. That is, the air which flows toward the third fan 330 in the upward direction via the second fan 260, the first air flow path 272 a of the third air guide 270, and the discharge flow path 282 a of the second discharge guide 280 may be discharged from the third fan 330, and thus, may be discharged to the outside through the second discharge portion 305, which may be positioned on the upper side of the third fan 330.

The third fan 330 may include a hub 331 having a shaft coupling portion to which a rotational shaft 336 of the third fan motor 335, which is the axial flow motor may be coupled, and a plurality of blades 333 which may be coupled to the hub 331 in the circumferential direction. The third fan motor 335 may be coupled to a lower side of the third fan 330 and may be disposed or provided inside of the third motor housing 337.

The first fan motor 165 and the second fan motor 265 may be disposed or provided in series relative to a longitudinal direction of the air cleaner 10. The second fan motor 265 and the third fan motor 335 may be disposed or provided in series relative to the longitudinal direction of the air cleaner 10. In summary, rotating shafts of the first fan motor 165, the second fan motor 265, and the third fan motor 335, or the first fan 160, the second fan 260, and the third fan 330 may be positioned on a same axis in a longitudinal direction.

The flow adjusting device 300 may include a flow guide portion or guide 320 which may be coupled to a lower side of the third fan housing 310, and thus, guide the air passing by the second discharge guide 280 to the third fan housing 310.

The flow guide 320 may include an introduction grill 325 that guides the air introduction to the third fan housing 310. The introduction grill 325 may have a concave shape in the downward direction.

A shape of the second discharge grill 288 of the second discharge guide 280 may be formed in a concave shape in the downward direction corresponding to a shape of the introduction grill 325. The introduction grill 325 may be seated on an upper side of the second discharge grill 288. By this configuration, the introduction grill 325 may be stably supported by the second discharge grill 288.

The flow adjusting device 300 may further include a rotation guide device or guide 350, which is installed or provided on or at a lower side of the flow guide 320, and thus, may guide rotation in the lateral direction and rotation in the vertical direction of the flow adjusting device 300. The rotation in the lateral direction may be referred to as a “first direction rotation” and the rotation in the vertical direction may be referred to as a “second direction rotation.”

The rotation guide 350 may include a guide main body 351, which may be coupled to the movement guide 320. The guide main body 351 may include a lower surface portion 351 a, at which the first and second guides may be installed or provided and a rim portion or rim 351 b, which may be provided on a rim of the lower surface portion 351 a and protrude in the downward direction.

The rotation guide 350 may include a first guide mechanism or guide that which guides the first direction rotation of the flow adjusting device 300, and a second guide mechanism or guide that guides the second direction rotation of the air flow control device 300. The first guide mechanism may include a first gear motor 363 that generates a drive force, and a first gear 360 rotatably coupled to the first gear motor 363. For example, the first gear motor 363 may include a step motor a rotational angle of which may be easily controlled.

The first gear 360 may be coupled to a motor shaft 363 a of the first gear motor 363. The first guide may further include a first gear shaft 362 that extends in the downward direction, that is, toward the third air guide 270 or the second discharge guide 280 from the first gear 360. The first gear 360 may be geared to the first rack 276 of the third air guide 270. A plurality of gear teeth may be formed in the first gear 360 and the first rack 276. When the first gear motor 363 is driven, the first gear 360 may rotate, and thus, link to the first rack 276. The third air guide device 270 may be fixed, and thus, the first gear 360 may be movable.

The shaft guide groove 277 of the third air guide 270 may guide movement of the first gear 360. That is, the first gear shaft 362 may be inserted into the shaft guide groove 277. The first gear shaft 362 may be moved in the circumferential direction along the shaft guide groove 277 in a rotation process of the first gear 360.

The first guide may include a rotational shaft 354, which may form a rotational center of the flow adjusting device 300. The first gear 360 and the first gear shaft 362 may be rotated along a rotating radius which may be set about the rotational shaft 354. The set rotating radius may be referred to as a “first rotating radius.”

The first rack 276 and the shaft guide groove 277 may have a length corresponding to a rotational amount or rotational angle of the flow adjusting device 300. A length in the circumferential direction of the first rack 276 and the shaft guide groove 277 may be formed slightly greater than a distance in the circumferential direction which the flow adjusting device 300 rotates. Accordingly, in a process of movement of the first gear 360, the first gear 360 may be prevented from being separated from the first rack 276. In addition, in a process of movement of the first gear shaft 362, the first gear shaft 362 may be prevented from interfering with the end portion of the shaft guide groove 277.

The rotational shaft 354 may be provided on a lower surface portion 351 a of the guide main body 351. That is, the rotational shaft 354 may protrude in the downward direction from the lower surface portion 351 a. The rotational shaft 354 may be inserted or provided in a shaft insertion portion 284 of the second discharge guide 280, and may be rotated in the shaft insertion portion 284. That is, when the first gear 360 rotates, the first gear shaft 362 and the first gear 360 may rotate about the rotational shaft 354 in the circumferential direction. The rotational shaft 354 may rotate in the shaft inserting portion 284. Accordingly, the flow adjusting device 300 may be rotated in a first direction, that is, in the clockwise direction or in the counterclockwise direction about the longitudinal direction as the axial direction.

The first guide may include bearings 353, and 355 that easily rotate the flow adjusting device 300 in the first direction. The bearings 353, 355 may reduce a friction force generated in the rotational process of the flow adjusting device 300. The bearings 353 and 355 include a first bearing 353 provided on a lower surface of the rotational guide 350, For example, the first bearing 353 may include a ball bearing.

In addition, the first guide may include a bearing supporting portion or support 354 that protrudes in the downward direction from the lower surface portion 351 a to support the first bearing 353. The bearing supporting portion 354 may be formed in a set length, to guide the first bearing 353 to be disposed at a position at which the first bearing 353 is capable of being in contact with the rotational guide plate 283.

The rotational guide plate 283 may include a bearing groove 285, into which the first bearing 353 may be inserted. In a process of rotation of the flow adjusting device 300 in the first direction, the first bearing 353 may be movable with the first bearing being inserted into the bearing groove 285. The first bearing 353 may be rotated along a rotating radius which is set about the rotational shaft 354. That is, the set rotating radius may be referred to as a “second rotating radius”. The second rotating radius may be formed to be less than the first rotating radius. That is, a distance from the rotational shaft 354 to the first bearing 353 may be shorter than a distance from the rotational shaft 354 to the first gear shaft 352. According to this configuration, the lower surface portion 351 a may be rotated by being stably supported by the third air guide 270 and the second discharge guide 280.

When the first gear shaft 362 is moved along the shaft guide groove 277, the first bearing 353 may be moved along the bearing groove 285. In order to allow the first gear shaft 362 and the first bearing 353 to be smoothly moved, a set curvature of the shaft guide groove 277 and a set curvature of the bearing groove 285 may be equal to each other.

The bearings 353 and 355 may include a second bearing 355. The second bearing 355 may be rotatably installed at the rim portion 351 b. A bearing insertion portion 351 c, to which the second bearing 355 may be coupled, may be formed at the rim portion 351 b. The bearing insertion portion 351 c may be depressed in the upward direction from a lower surface of the rim portion 351 b. In addition, a plurality of second bearing 355 may be provided. The second bearing 355 may be in contact with the discharge inner wall 282 of the second discharge guide 280, that is, the inner circumferential surface of the discharge inner wall 282 may form a contacting surface of the second bearing 355. The flow adjusting device 300 may be easily rotated in the first direction by the second bearing 355 rotating about the rotational shaft 354 along the inner circumferential surface of the discharge inner wall 282.

The second guide mechanism or guide may include a fixing guide member or guide 352, which may be fixed to the guide main body 351. The rotational shaft 354 may be provided in a lower surface of the fixing guide member 352.

The fixing guide 352 may support a lower side of the rotation guide 370, and include a first guide surface 352 a, which may guide rotation of the rotation guide 370 in a second direction. The first guide surface 352 a may form at least a portion of an upper surface of the fixing guide 352, and may extend rounded in the upward direction, corresponding to a rotation path of the rotation guide 370.

The fixing guide 352 may include a first guide bearing 359, which may reduce a friction force generated at a time of rotating movement of the rotation guide 370 by being in contact with the rotation guide 370. The first guide bearing 359 may be positioned to or at a side of the first guide surface 352 a.

The fixed guide 352 further may include a second gear inserting portion 352 b, into which the second gear 365 may be inserted for rotation of the rotation guide 370. The second gear inserting portion 352 b may be formed on one side of the first guide surface 352 a. For example, the second gear inserting portion 352 b may have a shape of at least a portion of the first guide surface 352 a being cut.

The second gear 365 may be positioned at a lower side of the first guide surface 352 a and at least a portion of the second gear 365 may project to an upper side of the second gear inserting portion 352 b through the second gear inserting portion 352 b.

The second guide may further include a second gear motor 367 which may be coupled to the second gear 365 and provide a drive force. For example, the second gear motor 367 may include a step motor. The second guide may further include a second gear shaft 366, which may extend from the second gear motor 367 to the second gear 365. When the second gear motor 367 is driven, the second gear shaft 366 and the second gear 365 may be rotated together.

The second guide 365 may also include a rotation guide member or guide 370, which may be provided on or at an upper side of the fixing guide 352. The rotation guide 370 may be coupled to a lower side of the flow guide 320.

That is, the rotation guide 370 may include a main body portion or body 371, which may be supported by the fixing guide 352. The main body 371 may include a second guide surface 372, which may move along the first guide surface. The first guide surface 372 may be rounded corresponding to a curvature of the first guide surface 352 a.

The rotation guide 370 may further include a second guide bearing 375, which may reduce a friction force generated at a time of rotating movement of the rotation guide 370 by being in contact with the fixing guide 352. The second guide bearing 375 may be positioned on or at a side of the second guide surface 372.

The rotation guide 370 may further include a second rack 374, which may be linked to the second gear 365. A plurality of gear teeth may be formed on the second gear 365 and the second rack 374, and the second gear 365 and the second rack 374 may be geared to each other through the plurality of gear teeth.

If the second gear motor 367 is driven, the rotation guide 370 may rotate in the vertical direction by linkage of the second gear 365 and the second rack 374. Accordingly, the flow adjusting device 300 may rotate in the second direction according to the movement of the rotation guide 370.

FIG. 12 is an exploded perspective view of a display device which is coupled to a discharge grill according to an embodiment. FIG. 13 is a view illustrating a state in which a PCB assembly is coupled to the discharge grill according to an embodiment. FIG. 14 is a perspective view of the discharge grill of FIG. 12. FIG. 15 is an exploded perspective view of the PCB assembly of FIG. 13. FIG. 16 is a view of an upper surface of the display device according to an embodiment. FIG. 17 is a view of a lower surface of the PCB assembly according to the embodiment. FIG. 18 is a view of a diffusing plate according to an embodiment. FIG. 19 is an enlarged view of portion “A” of FIG. 17.

Referring to FIGS. 12 to 16, the display device 600 according to the embodiment may be installed or provided at an upper portion of the air cleaner 10. The display screen 602 of the display device 600 may form at least a portion of the upper surface of the air cleaner 10.

The display device 600 may be installed or provided in or on the discharge grill 315. A depression portion or depression 318, which may be a depressed in the downward direction may be provided at a substantially center portion of the discharge grill 315, and a plurality of grill portions 315 a may extend toward the outside in the radial direction from the depression portion 318. In addition, the display device 600 may be disposed or provided on the upper side of the depression portion 318.

The display device 600 may include a PCB assembly 601. The PCB assembly 601 may include a display PCB 610 on which a plurality of illumination sources 651 and 655 may be provided, and a reflector 620 which may be coupled to the upper side of the display PCB 610 to allow light irradiated from the plurality of illumination sources 651 to be concentrated toward the display screen 602.

The plurality of illumination sources 651 and 655 may include a first illumination source 651 for that displays operation information of the air cleaner 10 and a second illumination source 655 that displays the rim portion of the display screen 602 of the display device 600. The display screen 602 is a set or predetermined area (hereinafter, referred to as a “display area”) in which the information may be displayed, and may be formed on the upper surface of the display device 600. In addition, the rim or portion of the display screen 602 may form a boundary of the display area.

The display PCB 610 may include a board main body 611 which may have a substantially circular shape. The board main body 611 may include a main body front surface portion or surface 611 a on which the first illumination source 651 may be installed or provided and a main body rear surface portion or surface 611 b, on which the second illumination source 655 may be installed or provided.

A plurality of first illumination sources 651 may be provided on the main body front surface portion 611 a, corresponding to a shape of a displayed content. In addition, a plurality of second illumination sources 655 may be provided. The plurality of second illumination sources 655 may be arranged along a rim portion or rim of the main body rear surface portion 611 b. For example, the plurality of second illumination sources 655 may be arranged in a circular shape.

The reflector 620 may include a reflector main body 621 and a through hole 623, which may be formed in the reflector main body 621 and allow light irradiated from the first illumination source 651 to be concentrated in the upward direction. The reflector main body 621 may be made of an opaque material through which transmission of light may be limited, or an opaque material may be coated on the reflector main body 621.

A reflector film 625 may be provided on or at an upper side of the reflector 620. The reflector film 625 may include a pattern display portion display 626 at or on which a content of displayed information, that is, a predetermined character, number, or symbol, may be displayed. The light concentrated through the reflector 620 may act on the pattern display portion 626, thereby implementing predetermined information. The pattern display portion 625 may be made of a transparent material.

For example, as shown in FIG. 19, the pattern display portion 626 may include characters conveying information to a user, such as “smell,” “dust,” “fine dust,” and “filter replacement,” a pattern 888 capable of displaying numbers, and/or a symbol that represents a strength of a blowing amount, for example.

The first illumination source 651 may be disposed or provided at a position corresponding to the pattern display portion 626. For example, the first illumination source 651 may be disposed or provided on or at a lower side of the pattern display portion 626. As a plurality of pattern display portions 626 may be provided to implement various patterns, a plurality of first illumination sources 651 may be provided corresponding to the plurality of pattern display portions 626. Light irradiated from the first illumination source 651 may be exposed to the outside by passing through the pattern display portion 626. In addition, various information may be displayed by on/off control of the plurality of first illumination sources 651.

Referring to FIGS. 18 and 19, the display device 600 may include a diffusing plate 630, which may surround an outside of the PCB assembly 601. The diffusing plate 630 may be a component that forms a rim portion or rim 650 of the display screen 602 by diffusing light irradiated from the second illumination source 655.

The diffusing plate 630 may be disposed or provided along the rim portion of the depression portion 318. That is, the diffusing plate 630 may include a plate main body 631, which may surround the display PCB 610 and an illumination accommodating portion 635 which may protrude from an inner circumferential surface of the plate main body 631 to allow the second illumination source 655 to be accommodated therein. The plate main body 631 may have a ring shape, and may be supported by the discharge grill 315. In addition, the plate main body 631 and the illumination accommodating portion 635 may be integrally formed.

The plate main body 631 and the illumination accommodating portion 635 may be made of a translucent material which is capable of refracting or diffusing light. For example, the plate main body 631 and the illumination accommodating portion 635 may be made of an acrylic material.

The plate main body 631 may form the rim portion 650 of the display screen 602. That is, an upper portion of the plate main body 631 may be exposed to the upper surface of the air cleaner 10, and light irradiated from the second illumination source 655 may be diffused through the illumination accommodating portion 635 and the plate main body 631. In addition, the diffused light may move to the upper portion of the air cleaner 10, thereby forming the rim portion 650.

As the plate main body 631 and the illumination accommodating portion 635 are made of a translucent material, the rim portion 650 may be implemented using soft light. Thus, a display screen having a comfortable feeling may be implemented.

The illumination accommodating portion 635 may include an accommodating space 635 e, in which the second illumination source 655 may be located or inserted. That is, the illumination accommodating portion 635 may include first and second side surface portions or surfaces 635 a and 635 b, which may extend to the inside in the radial direction from an inner circumferential surface of the plate main body 631, and a third side surface portion or surface 635 c, which may connect the first and second side surface portions 635 a and 635 b. In addition, the illumination accommodating portion 635 may include a fourth side surface portion or surface 635 d, which may be provided on or at a lower side of the first and second side surface portions 635 a and 635 b. The first to fourth side surface portions 635 a, 635 b, 635 c, and 635 d may be integrally formed. The first to fourth side surface portions 635 a, 635 b, 635 c, and 635 d and the inner circumferential surface of the plate main body 631 may define the accommodating space 635 e.

The display device 600 may include a display cover 640, which may be provided on or at an upper side of the PCB assembly 601. The display cover 640 may be a component that supports an outside of the display PCB 610 and maintains a cover film 645 in a flat position (see FIG. 20). The display cover 640 may be made of an opaque material for preventing transmission of light therethrough.

A cover hole 641, which may have a shape corresponding to the reflector film 625 may be formed in the display cover 640. According to the configuration of the cover hole 641, although the display cover 640 is coupled to the reflector 620, the reflector film 625 may be exposed in the upward direction.

The cover film 645 may be provided on the upper side of the display cover 640. For example, the cover film 645 may be attached to the upper surface of the display cover 640. The cover film 645 may be made of a translucent material to allow a portion of light transferred from the PCB assembly 601 to be transmitted therethrough. For example, the translucent material may include an acrylic or polymethyl methacrylate (PMMA) resin. The cover film 645 may be provided, so that information displayed through the display device 600 may be prevented from being implemented to be extremely dazzling. The cover film 645 may include a film display portion or display 646, which may allow a user to input a predetermined command or display a portion of a plurality of operation information of the air cleaner 10. For example, the film display portion 646 may include information input by a user, that is, character information, such as an “operation mode,” a “wind strength,” a “ventilation strength,” and “off reservation.” In addition, the film display portion 646 may include character information, such as an “air state” and “cleaning display lamp,” which notifies some operation information of the air cleaner 10.

FIG. 20 is a view illustrating an operation of the display device according to an embodiment. Referring to FIG. 20, the grill inner wall 317 of the discharge grill according to an embodiment may include a PCB supporting portion or support 317, which may support the display PCB 610, and a diffusing plate supporting portion or support 317 b, which may extend to an outside of the PCB supporting portion 317 a to support the diffusing plate 630.

The PCB supporting portion 317 a may extend in the upward direction from the depression portion 318. In addition, the diffusing plate supporting portion 317 b may include a first portion that extends to the outside in the radial direction from the PCB supporting portion 317 a, and a second portion that extends at an incline to the outside in the upward direction from the first portion.

The diffusing plate 630 may be mounted on an upper surface of the diffusing plate supporting portion 317 b. At least a portion of the diffusing plate 630 may be located in a space defined by the display PCB 610, the PCB supporting portion 317 a, and the diffusing plate supporting portion 317 b.

An operation of the second illumination source 655 and the diffusing plate 630 will be described hereinafter. If the second illumination source 655 is driven, light may be irradiated in the downward direction from the second illumination source 655. The irradiated light may be transferred to the outside in the radial direction through the diffusing plate 630. In this process, the light may be refracted or diffused inside of the diffusing plate 630.

In addition, relatively strong light which is irradiated from the second illumination source 655 may be converted into gentle or soft light while moving along the diffusing plate 630. In particular, based on a color of the diffusing plate 630, the light may be implemented as light corresponding to the color.

The light which is transferred to the outside in the radial direction through the diffusing plate 630 may be implemented in a circular shape along an outer circumferential surface of the display PCB 610 or an inner circumferential surface of the grill inner wall 317. Thus, the light may form a boundary area of the display screen 602.

As described above, by driving of the second illumination source 655, a rim or boundary area of the display screen 602 may be displayed, and thus, information which is displayed through the display device may be visually emphasized. Accordingly, a user may easily identify the information even from a slightly long distance.

In addition, as the second illumination source 655 may be disposed or provided on the main body rear surface portion 611 b of the display PCB 610, spatial utilization for installing the first and second illumination sources 651 and 655 on the display PCB 610 may be improved in comparison with when the second illumination source 655 is disposed or provided on the main body front surface portion 611 a. Accordingly, a compactness of the display PCB 610 may be implemented.

FIGS. 21 to 23 are views illustrating a state in which air flows in the air cleaner of FIG. 1.

First, the flow of air according to driving of the first blowing device 100 will be described. If the first fan 160 is driven, indoor air may be suctioned inside portion of the first case 101 through the first suction portion 102 and the base suction portion 103. The suctioned air may pass through the first filter 120, and foreign materials in air may be filtered in this process. In a process in which air passes through the first filter 120, the air may be suctioned in the radial direction of the first filter 120, filtered, and then flows in the upward direction.

The air having passed through the first filter 120 may flow to the upper side in the radial direction while passing through the first fan 160 and stably flow in the upward direction while passing through the first air guide 170 and the second air guide 180. Air passing through the first air guide 170 and the second air guide 180 may pass by the first discharge guide 190 and flow in the upward direction through the first discharge portion 105. Air which is discharged through the first discharge portion 105 may be guided by the dividing plate 430 positioned to the upper side of the first discharge guide 190, and thus, may be discharged outside of the air cleaner 10.

If the second fan 260 is driven, indoor air may be suctioned inside of the second case 201 through the second suction portion 202 and the base suction portion 103. The suctioned air may pass through the second filter 220, and foreign materials in air may be filtered in this process. In a process in which air passes through the second filter 220, the air may be suctioned in the radius direction of the second filter member 220, filtered, and then flow in the upward direction.

Air which passes through the second filter 220 may flow to the upper side in the radial direction while passing through the second fan 160, and stably flow in the upward direction while passing through the third air guide 270 and the second discharge guide 280. Air having passes through the third air guide 270 and the second discharge guide 280 may be discharged through the second discharge portion 305 via the air flow control device 300.

As shown in FIG. 21, a position in which the flow adjusting device 300 is laid out may be referred to as a “first position.” On the other hand, as shown in FIGS. 22 and 23, a position in which the flow adjusting device 300 protrudes at an incline to the upper side of the air cleaner 10 by being rotated in a second direction may be referred to as a “second position.”

If the flow adjusting device 300 is in the first position, air which is discharged from the flow adjusting device 300 may flow in the upward direction. On the other hand, if the flow adjusting device 300 is in the second position, air which is discharged from the flow adjusting device 300 may flow toward the front upper side. By the flow adjusting device 300, an air volume of air discharged from the air cleaner 10 may be increased, and purified air may be supplied to a position distant from the air cleaner 10.

That is, if the third fan 330 of the flow adjusting device 300 is driven, at least a portion of air which is discharged from the second discharge guide 280 may be introduced to the inside portion of the third fan housing 310. Then, the introduced air may pass through the third fan 330, and be discharged to the outside through the second discharge portion 305. At this time, the air which is discharged through the second discharge portion 305 may flow toward the upper side of a front. The term “front” may be understood as a direction in which the second discharge portion 305 faces.

Rotation in a first direction may be performed in a state in which the flow adjusting device 300 is located at the second position. As described above, the first rotation in a first direction may be a rotation which is performed by linkage of the first gear 360 and the first rack 276.

According to this operation, air which is discharged from the air cleaner 10 does not simply flow in the upward direction, but rather, may flow in the frontward direction, and thus, an air current toward a space relatively distant from the air cleaner 10 may be generated. As the separate third fan 330 is provided in the flow adjusting device 300, a blowing force of the discharged air may be increased.

In addition, the flow adjusting device 300 is capable of performing the first direction rotation, and thus, air may be discharged to both sides of the front of the air cleaner 10. Accordingly, an air current may be provided toward a relatively wide room space.

The flow adjusting device 300 may be selectively operated based on an operation mode of the air cleaner 10. When the air cleaner 10 is operated in a general operation mode (first operation mode), the flow adjusting device 300 may be located at or in the first position in which the flow adjusting device 300 is laid out, as shown in FIGS. 1 and 21. Then, the first and second blowing devices 100 and 200 may be driven, thereby forming a plurality of independent air currents.

That is, if the first blowing device 100 is driven, air may be suctioned through the first suction portion 102 and the base suction portion 103 and then discharged through the first discharge portion 105 by passing through the first filter 120 and the first fan 160. In addition, if the second blowing device 200 is driven, air may be suctioned through the second suction portion 202 and pass through the third fan 330 via the second filter 220 and the second fan 260. The third fan 330 is driven to have a rotation number corresponding to a rotation number of the second fan 260, thereby guiding air flow. The air current may be changed toward both sides of the front of the air cleaner while the flow adjusting device 300 is performing the first direction rotation in the state in which the flow adjusting device 300 is located at the first position.

On the other hand, when the air cleaner 10 is operated in a flow conversion mode (second operation mode), the flow adjusting device 300 may protrude from the upper end portion of the air cleaner 10 by being rotated in the upward direction, as shown in FIGS. 22 and 23. In the flow conversion mode, driving of the first and second blowing devices 100 and 200 may be identical to driving of the first and second blowing devices 100 and 200 in the general operation mode.

Then, the third fan 330 is driven, and accordingly, at least a portion of air which passes through the second fan 260 may be introduced to the third fan housing 310. In addition, at least a portion of the introduced air may be discharged toward the front of the air cleaner 10 while passing through the third fan 330.

Accordingly, the aforementioned embodiments should be construed not to limit the technical spirit but to be provided for illustrative purposes so that those skilled in the art can fully understand the spirit of the present disclosure.

The scope of the present disclosure should not be limited to the aforementioned embodiments but defined by appended claims. The technical spirit within the scope substantially identical with the scope of the present disclosure will be considered to fail in the scope of the present disclosure defined by the appended claims.

According to embodiments disclosed herein, a suction capacity may be improved as the suction portion is formed along an outer circumferential surface of a cylindrical case and a structural resistance of the case may not be generated in an air suction process. In addition, discharge of air in the upward direction may be guided through the second blowing device and discharge of air in the frontward direction may be guided by the air flow control device, which may be provided on or at an upper side of the second blowing device. Discharge of air in the lateral direction may be guided, in a process of rotating of the air flow control device. Finally, an air cleaning function of an indoor space may be improved as discharge of air in various directions may be guided relative to the air cleaner and a discharge air flow may be formed to extend a long distance from the air cleaner. A discharge air flow may be easily generated toward a circumferential space of a person in a room whether the person in the room sitting down or standing up.

A display device or display may be provided at an upper portion of the air flow control device, so that operation information of the air cleaner may be easily recognized to or at the outside. In particular, the display device may be well exposed to the outside not only when the air flow control device is in an inclinedly erected state (second position) relative to the axial direction, but also when the air flow control device is in a laid out state (first position) relative to the axial direction, so that operation information of the air cleaner may be easily identified.

The air flow control device may include a discharge grill, and a depression portion provided at a center portion of the discharge grill. Thus, the display device may be installed, and a discharge portion through which air may be discharged may be formed along a circumference of the depression portion. Accordingly, it is possible to improve spatial utilization of the air cleaner. Further, it is possible to prevent flow of air discharged through the discharge portion from interfering with by the display device.

The display device may include a PCB assembly, that is, a display PCB having a first illumination source and a reflector which may be coupled to the display PCB, so that it is possible to easily implement various characters, numbers, or symbols relative to the operation of the air cleaner.

A second illumination source may be provided on or at a the lower surface of the display PCB, and a diffusing plate having an illumination accommodating portion which accommodates the illumination source therein may be provided on or at the lower side of the display PCB, so that light irradiated from the illumination source may be refracted through the diffusing plate to be easily moved to a rim portion or rim of the front surface of the display device. Finally, it is possible to obtain an effect that information displayed through the display device may be visually emphasized. Accordingly, a user may easily identify the information even at a slightly distant distance.

Spatial utilization for installing the display PCB may be improved in comparison with when the second illumination source is provided on the upper surface of the display PCB, and compactness of the display PCB may be implemented. Further, as the display device may include a display cover that covers the reflector, the PCB assembly may be protected. As a sheet which is made of a translucent material may be provided on the display cover, light irradiated from the first illumination source or the second illumination source may be diffused. Finally, a display portion which that emits gentle or soft light may be provided, so that glare may be prevented.

A blowing capacity of the air cleaner may be improved as a plurality of blowing devices may be provided. In addition, the air which flows in the radial direction through a centrifugal fan may be easily guided toward the discharge portion in the upward direction, as the centrifugal fan for increasing the blowing capacity of the air cleaner and the air guide, which may be disposed or provided on or at an outlet side of the centrifugal fan may be provided.

Also, a phenomena that interference between air flows may be prevented as the air flows which are independent from each other may be generated through the first blowing device and the second blowing device. Accordingly, an air flow capacity can be improved.

Embodiments disclosed herein provide an air cleaner which is capable improving a suction capacity of air which is suctioned to the air cleaner. Embodiments disclosed herein also provide an air cleaner which is capable of sufficiently suctioning air around a person in a room whether the person in the room sitting down or standing up by including a suction flow path which is directed from a circumferential direction of the air cleaner to an inside thereof and a suction flow path through which air may be introduced through an upper portion and a lower portion of the air cleaner.

Embodiments disclosed herein provide an air cleaner which is capable of discharging air which is discharged from the air cleaner in various directions and sending the discharged air to a long distance. In particular, embodiments disclosed herein provide an air cleaner which is capable of easily discharging air toward a surrounding space of a person in a room whether the person in the room sitting down or standing up by a discharge air flow being easily generated in an upward direction, a frontward direction, and a lateral directions of the air cleaner.

Embodiments disclosed herein provide an air cleaner which includes a display device or display capable of easily displaying operation information of the air cleaner to the outside. Embodiments disclosed herein also provide an air cleaner in which the display device is provided in a rotatable air flow control device or controller, so that a user may easily identify operation information of the air cleaner regardless of a position at which the air flow control device is rotated.

Embodiments also provide an air cleaner a blowing capacity of which may be increased.

Embodiments further provide an air cleaner in which an air guide device or guide is provided which allows air passing through a centrifugal fan to easily flow toward a discharge portion in an upward direction in a case of adopting the centrifugal fan in order to increase a blowing capacity.

Embodiments provide further an air cleaner which improves purification capacity of a filter and in which replacement of the filter more easily performed. Further, embodiments disclosed herein provide an air cleaner in which a filter may be easily installed without an installation space for installing the filter in an inside portion of the air cleaner being additionally provided.

Embodiments disclosed herein provide an air cleaner that may include a blowing device including a main fan that generates air flow and a first discharge portion or outlet from which air passing through the main fan may be discharged; an air flow control device or controller including a sub-fan which may be provided to be movable at one side of the blowing device and generates air flow and a discharge grill from which air passing through the sub-fan may be discharged; and a display device or display provided in the discharge grill, the display device displaying operation information. The discharge grill may include a depression portion or depression formed at a center portion of the discharge grill; a plurality of grill portions that extends to the outside in a radial direction from the depression portion, and a second discharge portion or outlet formed between the plurality of grill portions, the second discharge portion allowing air to be discharged therefrom.

The display device may be disposed at one side of the depression portion. The display device may include a display PCB, on which a plurality of illumination sources may be installed or provided, and a reflector coupled to one side of the display PCB, the reflector concentrating light irradiated from the plurality of illumination sources. The plurality of illumination sources may include a first illumination source for that displays operation information of the air cleaner, and a second illumination source that implements a rim portion or rim of a display screen on which the operation information may be displayed.

The display PCB may include: a main body front surface portion or surface, on which the first illumination source may be installed or provided and a main body rear surface portion on surface on which the second illumination source may be installed or provided.

The display device may further include a diffusing plate disposed or provided to surround the display PCB, the diffusing plate guiding light irradiated from the second illumination source toward the rim portion of the display screen. The display PCB may have a circular shape, and the diffusing plate may have a ring shape.

The diffusing plate may include a plate main body supported by the discharge grill, and an illumination accommodating portion that protrudes from an inner circumferential surface of the plate main body to allow the second illumination source to be installed or provided therein.

The plate main body and the illumination accommodating portion may be integrally formed. The plate main body or the illumination accommodating portion may be made of a translucent material through which refraction or diffusion of light is possible.

The illumination accommodating portion may include first and second side surface portions or surfaces that extend to the inside in the radial direction from the inner circumferential surface of the plate main body; a third side surface portion or surface which connects the first and second side surface portions; and a fourth side surface portion or surface provided on or at a lower side of the first and second side surface portions. The first to fourth side surface portions and the inner circumferential surface of the plate main body may define an accommodating space into which the second illumination source may be inserted.

The discharge grill may include a grill outer wall; a grill inner wall provided inside of the grill outer wall; a plurality of grill portions that extends from the grill outer wall to the grill inner wall; and a second discharge portion or outlet formed between the plurality of grill portions.

The display device may include a display PCB supported by the grill inner wall, on which a plurality of illumination sources may be installed or provided. The display device may include a display cover that supports an outside of the display PCB, and a cover film attached to the display cover to allow a portion of light transferred from a PCB assembly to be transmitted therethrough.

The air flow control device may include a first guide mechanism or guide that guides a first direction rotation of the air flow control device, and a second guide mechanism or guide that guides a second direction rotation of the air flow control device. Each of the first guide mechanism and the second guide mechanism may include a gear and a gear motor.

The air flow control device may be disposed on or at an upper side of the blowing device. The display device may form an upper surface of the air flow control device.

Any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art. 

What is claimed is:
 1. An air cleaner, comprising: a blowing device including a main fan that generates air flow and a discharge outlet through which air passing through the main fan is discharged; a flow controller provided at an upper side of the blowing device, the flow controller including: a fan housing into which air discharged through the discharge outlet is introduced; a sub-fan that is provided in the fan housing; and a discharge grill through which air passing through the sub-fan is discharged, the discharge grill being provided at a top of the fan housing; a display provided in the discharge grill, the display including an input part and a display part to display operation information of the air cleaner, wherein the flow controller is movable in a vertical direction between a first position in which the display is at a laid-out state and a second position in which the display is at an inclined erected state, wherein the sub-fan and the display move when the flow controller moves between the first position and the second position.
 2. The air cleaner of claim 1, wherein the discharge grill includes: a cylindrical grill outer wall; a cylindrical grill inner wall provided inside of the grill outer wall; a plurality of grill portions that extends from the grill outer wall to the grill inner wall; and a second discharge outlet formed between the plurality of grill portions.
 3. The air cleaner of claim 1, wherein the display has a circular shape, and wherein an outer circumferential surface of the display is fitted with the cylindrical grill inner wall
 4. The air cleaner of claim 2, wherein the discharge grill further includes a depression portion formed at a center portion of the discharge grill, the depression portion provided at an inner side of the cylindrical grill inner wall, wherein the display is provided on the depression portion.
 5. The air cleaner of claim 4, further comprising a supporting rib provided in the depression portion to support the display, wherein the supporting rib protrudes upward from an upper surface of the depression portion.
 6. The air cleaner of claim 5, wherein the grill inner wall supports a bottom of the display.
 7. The air cleaner of claim 1, wherein the display further includes: a display printed circuit board (PCB) on which a plurality of illumination sources is provided; and a reflector coupled to one side of the display PCB, the reflector concentrating light irradiated from the plurality of illumination sources.
 8. The air cleaner of claim 7, wherein the display PCB includes: a main body front surface on which the first illumination source is provided; and a main body rear surface on which the second illumination source is provided.
 9. The air cleaner of claim 8, wherein the reflector includes: a reflector main body made of an opaque material; and a through hole that is formed in the reflector main body and allows light irradiated from the first illumination source to be concentrated in the upward direction.
 10. The air cleaner of claim 8, further comprising a diffusing plate configured to guide light irradiated from the second illumination source toward the rim of the display, wherein the diffusing plate includes: a plate main body supported by the discharge grill; and an illumination accommodating portion that protrudes from an inner circumferential surface of the plate main body to allow the second illumination source to be provided therein.
 11. The air cleaner of claim 10, wherein the display PCB has a circular shape, and the diffusing plate has a ring shape to surround the display PCB.
 12. The air cleaner of claim 10, wherein at least one of the plate main body or the illumination accommodating portion is made of a translucent material through which diffusion of light is performed.
 13. The air cleaner of claim 10, wherein the illumination accommodating portion includes: first and second side surfaces that extend to an inside in a radial direction from the inner circumferential surface of the plate main body; a third side surface that connects the first and second side surfaces; and a fourth side surface provided at a lower side of the first and second side surfaces.
 14. The air cleaner of claim 13, wherein the first to fourth side surfaces and the inner circumferential surface of the plate main body define an accommodating space into which the second illumination source is inserted.
 15. The air cleaner of claim 7, wherein the display further includes: a display cover that supports an outside of the display PCB; and a cover film attached to the display cover to allow a portion of light transferred from the display PCB to be transmitted therethrough.
 16. The air cleaner of claim 1, wherein the flow controller is provided at an upper side of the blowing device.
 17. The air cleaner of claim 16, wherein the flow controller includes: a housing: a flow guide provided at a lower side of the housing, the flow guide including an introduction grill that defines an inlet into which air discharged from the blowing device is introduced, wherein the sub-fan is provided within the housing and the introduction grill.
 18. The air cleaner of claim 17, wherein the flow controller further includes: a rotation guide device configured to guide rotation in a vertical direction of the air flow controller, the rotation guide device including: a guide body provided at a center of the introduction grill and; a rotational guide member provided between the introduction grill and the guide body.
 19. The air cleaner of claim 18, wherein the flow controller further includes a gear that is provided at the guide body, when the gear and the rotational guide member communicate with each other, the flow guide and the rotational guide member rotate in the vertical direction of the air flow controller.
 20. The air cleaner of claim 18, wherein the air flow controller further includes a gear motor coupled to the gear, wherein the gear motor is installed on a bottom of the guide body. 